Top Definition
When two males acknowledge having hooked up with the same female but not performing sexual intercourse. They never entered the igloo but merely explored the vast tundra much like a penguin.
Bro #1 "Dude did you bang that chick last night?"

Bro #2 "nah dude... I only got to 3rd base"

Bro #1 "me too! Penguin brothers!"
by Bagel2135 February 06, 2014
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